v3.25.2
Shareholder Report
 6 Months Ended
Jun. 30, 2025
USD ($)
Holding
Shareholder Report [Line Items]  
Document Type N-CSRS
Amendment Flag false
Registrant Name Columbia Funds Variable Insurance Trust
Entity Central Index Key 0000815425
Entity Investment Company Type N-1A
Document Period End Date Jun. 30, 2025
Columbia Variable Portfolio – Small Company Growth Fund - Class 1  
Shareholder Report [Line Items]  
Fund Name Columbia Variable Portfolio – Small Company Growth Fund
Class Name Class 1
No Trading Symbol Flag true
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about Columbia Variable Portfolio – Small Company Growth Fund (the Fund) for the period of January 1, 2025 to June 30, 2025.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] You can find additional information about the Fund at
columbiathreadneedleus.com/resources/literature
. You can also request more information by contacting us at
1-800-345-6611.
Additional Information Phone Number 1-800-345-6611
Additional Information Website columbiathreadneedleus.com/resources/literature
Expenses [Text Block]
What were the Fund costs for the reporting period?
(Based on a hypothetical $10,000 investment)
ClassCost of a $10,000 investmentCost paid as a percentage of a $10,000 investment
Class 1
$
43		0.85
%
(a)
(a)
Annualized.
Expenses Paid, Amount $ 43
Expense Ratio, Percent 0.85% [1]
Net Assets $ 228,104,240
Holdings Count | Holding 90
Investment Company, Portfolio Turnover 60.00%
Additional Fund Statistics [Text Block]
Key Fund
Statistics
Fund net assets
$
228,104,240
Total number of portfolio holdings
90
Portfolio turnover for the reporting period
60%
Holdings [Text Block]
Graphical Representation of Fund
 
Holdings
The tables below show the investment makeup of the Fund represented as a percen
tage
of Fund net assets. Derivatives are excluded from the tables unless otherwise noted. The Fund's portfolio composition is subject to change.
Top Holdings
RBC Bearings, Inc.3.5
%
Ollie's Bargain Outlet Holdings, Inc.2.5
%
Talen Energy Corp.2.4
%
Lumentum Holdings, Inc.2.3
%
MasTec, Inc.2.3
%
Glaukos Corp.2.2
%
Kratos Defense & Security Solutions, Inc.2.2
%
Aerovironment, Inc.2.2
%
SiTime Corp.2.2
%
Carpenter Technology Corp.2.2
%
Asset Categories
Graphical Representation - Allocation 1 Chart
Equity Sector Allocation
Graphical Representation - Allocation 2 Chart
Largest Holdings [Text Block]
Top Holdings
RBC Bearings, Inc.3.5
%
Ollie's Bargain Outlet Holdings, Inc.2.5
%
Talen Energy Corp.2.4
%
Lumentum Holdings, Inc.2.3
%
MasTec, Inc.2.3
%
Glaukos Corp.2.2
%
Kratos Defense & Security Solutions, Inc.2.2
%
Aerovironment, Inc.2.2
%
SiTime Corp.2.2
%
Carpenter Technology Corp.2.2
%
Columbia Variable Portfolio – Small Company Growth Fund - Class 2  
Shareholder Report [Line Items]  
Fund Name Columbia Variable Portfolio – Small Company Growth Fund
Class Name Class 2
No Trading Symbol Flag true
Annual or Semi-Annual Statement [Text Block] This semi-annual shareholder report contains important information about Columbia Variable Portfolio – Small Company Growth Fund (the Fund) for the period of January 1, 2025 to June 30, 2025.
Shareholder Report Annual or Semi-Annual semi-annual shareholder report
Additional Information [Text Block] You can find additional information about the Fund at
columbiathreadneedleus.com/resources/literature
. You can also request more information by contacting us at
1-800-345-6611.
Additional Information Phone Number 1-800-345-6611
Additional Information Website columbiathreadneedleus.com/resources/literature
Expenses [Text Block]
What were the Fund costs for the reporting period?
(Based on a hypothetical $10,000 investment)
ClassCost of a $10,000 investmentCost paid as a percentage of a $10,000 investment
Class 2
$
55		1.10
%
(a)
(a)
Annualized.
Expenses Paid, Amount $ 55
Expense Ratio, Percent 1.10% [1]
Net Assets $ 228,104,240
Holdings Count | Holding 90
Investment Company, Portfolio Turnover 60.00%
Additional Fund Statistics [Text Block]
Key Fund
Statistics
Fund net assets
$
228,104,240
Total number of portfolio holdings
90
Portfolio turnover for the reporting period
60%
Holdings [Text Block]
Graphical Representation of Fund
 
Holdings
The tables below show the investment makeup of the Fund represented as a percentage of Fund net as
sets.
Derivatives are excluded from the tables unless otherwise noted. The Fund's portfolio composition is subject to change.
Top Holdings
RBC Bearings, Inc.3.5
%
Ollie's Bargain Outlet Holdings, Inc.2.5
%
Talen Energy Corp.2.4
%
Lumentum Holdings, Inc.2.3
%
MasTec, Inc.2.3
%
Glaukos Corp.2.2
%
Kratos Defense & Security Solutions, Inc.2.2
%
Aerovironment, Inc.2.2
%
SiTime Corp.2.2
%
Carpenter Technology Corp.2.2
%
Asset Categories
Graphical Representation - Allocation 1 Chart
Equity Sector Allocation
Graphical Representation - Allocation 2 Chart
Largest Holdings [Text Block]
Top Holdings
RBC Bearings, Inc.3.5
%
Ollie's Bargain Outlet Holdings, Inc.2.5
%
Talen Energy Corp.2.4
%
Lumentum Holdings, Inc.2.3
%
MasTec, Inc.2.3
%
Glaukos Corp.2.2
%
Kratos Defense & Security Solutions, Inc.2.2
%
Aerovironment, Inc.2.2
%
SiTime Corp.2.2
%
Carpenter Technology Corp.2.2
%
[1] Annualized.